Drilling tool



5 w w 9 i a V M INVENTOR ATTORNEYS Aug. 30, 1927.

Filed Feb. 9. 9

WITNESSES fia- 1711 Patented Aug e '30,

UNITED, sTA

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Y Application and February 9,1924 s -m No. 691,817.

This invention relates to drilling devices, especially adapted for use in connection with the rotary system of drilling.

One of the principal obstacles, encountered '15 A further object is to provide a combined bit and sampling tool which drillsa hole of a uniform diameter throughout so that the necessity of reaming the lower portion of the hole subsequent to .taking'a sample is overcome. I

Further the invention aims to provide a combined bit and sampling tool having simple means to prevent the loss of a sample of the formation and'which is providedwwith means whereby the sample is preserved as long as the run continues.

, tion will be apparent during the course of the following description;

In the accompanying drawing'forming a part 'of this application, and in which like I numerals are employed vto designate like parts throughout the same,, V v F'gure 1 is a side elevation of the improved cutting and sampling tool;

Figure2 is a similar view, the view being taken at right anglesto Figure 1;

Figure 3 isa central vertical longitudinal sectional 'view through the improved tool;

- taken on line 4--4.of Figure 2; v Figure 5 is v a transverse sectional view taken on line 5-5 of Figure 3; Figure .6 is a-horizontal sectional view taken on the line 6--6-of Figure 3;

Figure 7 is a side elevation of one of the blades or cutters embodied inth'e invention, In the drawingswherein for the purpose of illustration is shown a preferred embodi-v j ment of the invention, the numeral5 designates a body having a longitudinal bore .6 Evhich constltu'tes a sample receiving chamer. I

Figure 3 illustrates that the forward portion of the body is provided with oppositely arranged recesses 7 to'snugly receive the at Other objects and advantages of the inven- V Figure 4 is a transverse sectional -view,;

'tion of the bore of the nipple. The upward movement of the'slips is limited by the lower end'of the head 12 and it is thusseen that the longitudinalmovement of the slips is tending inwardly from itching portions 8 of re cuttrs In carrying out the invention the attaching port ons of the cutters are formed with openings ahned with similar ope s in the With reference to Figure 1 it will be observed that the head llof each fastening bolt 10 is provided witha squared opening" for the reception of a tool by means of which the bolt may be either fastened or loosened. Of course the opening in the head 11- may be triangular or any other shape which will allow the mp1 to have a gripping engagement'with the bolt, Also the body 5 1s counterbored to receifve'the enlarged head of the bolt 10 so. that no portion of the bolt projects beyond the periphery of thebody.

o0 body 5 to snugly receive fastening olts 10. r

' Figures 1 and 3 illustrate that theblades or cutters 9 extend beyond the periphery of the body 5-and constitutethe major cutters 1n the device and are more or less of fishta'il design. Also the cutters-9 are -on op-' posite sides of the head 12 and constitute;

a protecting means for the same. The head '12 has threaded engagement .wit-h-a' nipple 14 which receives slips 16 by means of which the formation or sample isprevented from V dropping out of y the. lower end of thetoo l B5 during surface. y

The nipple 14 is provided on'its inner side. with an inclined -wall by means of whlch the teeth of the slips 16 are urged into engagement with the formation. That; is to the withdrawalof the tool to the 1 say, the boreof thenipple 14 is tapered at its upper portionso that as the slips descend 7 they will he urged into engagement with the formation, The descent of the slipsin" the nipple 14 is limited by means of anan'nular shoulder 18 directly'beneath the tapered porlimited. .Furthermore, the slips 16-are held in -position'with relation to each other-by means of oppositely arr'ang'edfribs 20 exopposite sides .of the internal wall of the nipp e. v r

The forward ortion of the member 14 is formed with a t 'readed extension to which 'a cutter head 22 is connected and the said aoi In the case of an ordinary well of about fourteen inches in diameter a four inch sample may be taken and as the width of-the wall of the cutter head 22 is one inch the total cut made by the cutter head will be six inches. In addition to this, the reaming cutters 9 will make four inch cuts so that the total diameter of fourteen'inches is provided for.

In operation, the drilling is started in the usual manner'and the sample enters by way of the cutter head 22 and the nipple 14, and the run may continue for as long as desired. At any time'the formation may be tested and thus the possibility of drilling through the producing sands is overcome. 1

Of course any size tool may be employed and the cutting area of the members 9 and the members 22 may be varied as the occasion requires. a i

In carrying out the invention the inner wallsof the recesses 7 are provided with projections 40 adapted to be received in recesses 4:2 in the inner edges of the attaching portions 8 of the cutters 9. By reason of this construction the body 5 is strengthened and the connection between the attaching portions 8 and the body 5 is. also strengthened.

The cutter head 22 is provided with internal rooves having communication with radial openings 52 for the passage of the. fluid by means of which the drilling is facilitated. In carrying out the invention any number of cutters maybe employed.

Hayin thus described the invention, what is claime 1s:

1. In a device of the character described, 2

a cutter carryin body or head having longitudinally exten 'ng grooves at its lower end,

being located-to fit into a recess in the associated cutter shank at a point intermediate the securing bolts for said shank.

2. In a device of the character described, a nipple, interiorly threaded at its upper end and adapted to be threaded upon a tool carrying body member, the bore of the nipplebeing flared outwardly from a point adjacent'its lower end and in an upward direction, diametrically disposed. ribs formed upon the outwardl nipple bore adapts to form a pair of'opr posed runways, and a pair of core retaining members each com 'rislng a block arcuate in shape and adapted to slidingly fit within runways formed by the ribs, theupward movement of the core retaining members be; ing limited by the associated and of a too carrying body to which the upper end oi the nipple may be threaded.

PERCY BBUNT,

flared portion of the 

